论文部分内容阅读
引进抗虫树种,改变树木组成,是抑制森林害虫的重要措施之一。我省在五十年代发生日本松干蚧(Matscoccus matsumurae Kuwana)的初期,曾在青岛中山公园等地进行过抗虫树种的研究,并肯定了落叶松是抗日本松干蚧的优良树种。为了进一步探讨北方地区几种主要针叶树对日本松干蚧的抗虫作用,我们又于1983年对日本落叶松等8个树种,进行了统一对比接虫试验和引种生长情况的调查。同时,
The introduction of insect-resistant species, changing the composition of trees is one of the important measures to inhibit forest pests. In the early 1950’s when Matsumoto matsumurae Kuwana occurred in our province, we conducted insect-resistant tree species research in Zhongshan Park in Qingdao, and confirmed that larch is an excellent tree species resistant to Japanese pine and dry scales. In order to further explore the insecticidal action of several major conifers in the north on Japanese pine scale, we conducted a survey of eight species of Japanese larch, such as Larix principis-rupprechtii, in 1983, on a single pest test and the introduction of growth. Simultaneously,